Perhaps you should try some spelling variations:
phuong thao » phuong phap, phuong thuc
thong duong » tuong duong, thong dung, thong huong
thieu sach » chieu sach, thien hach, hieu cach
phuong cao » phung cao, phuong cham, phuong cach
duong dan » duong dang, huong dan, duong van
khan ap » khan cap, khan dam
han ap » han tap, dan ap, han phap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thanh ((phuong cao) OR (phuong thao)) thong duong dan ((khan ap) OR (han ap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sach - thanh ((phuong cao) or (phuong thao)) thong duong dan ((khan ap) OR (han ap))~".
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - thanh ((phuong cao) or (phuong thao)) thong duong dan ((khan ap) OR (han ap))*.